scsi: pmcraid: Correct function name pmcraid_show_adapter_id() in header

scsi: pmcraid: Correct function name pmcraid_show_adapter_id() in header

Fixes the following W=1 kernel build warning(s):

 drivers/scsi/pmcraid.c:4079: warning: expecting prototype for pmcraid_show_io_adapter_id(). Prototype was for pmcraid_show_adapter_id() instead

Link: https://lore.kernel.org/r/20210317091230.2912389-14-lee.jones@linaro.org
Cc: "James E.J. Bottomley" <jejb@linux.ibm.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: Anil Ravindranath <anil_ravindranath@pmc-sierra.com>
Cc: linux-scsi@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>